LM74502-Q1: LM74502-Q1: Load Dump Protection

user4606857

Intellectual 301 points

Part Number: LM74502-Q1
Other Parts Discussed in Thread: LM74721-Q1, LM74701-Q1, , LM74502H, LM74502

Hi, Can this circuit pass ISO 16750-2 Test Pulse 5a

Us: 202V, Ua: 28V, Ri: 1Ω, td: 350ms, tr: 10ms, 10 pulses at 1min intervals

2 个月前

0 FRANK1 2 个月前

TI__Genius 10710 points

Thank you for contacting TI China E2E forum and choosing our products as part of your solution.
Regarding your query, please give us some time to check this issue.

0 FRANK1 2 个月前回复 FRANK1

TI__Genius 10710 points

LM747x1-Q1 and LM74502-1 can pass ISO 7637-2 Pulse 2 to 4 tests.
LM74701-Q1 , LM74721-Q1 are capable of input TVS less operation for ISO 7637-2 Pulse 1 but these are not capable of supporting 200V unsuppressed load dump.
LM74502-Q1 is capable of supporting 200V unsuppressed load dump but not capable of TVS less operation for ISO 7637-2 Pulse 1.

Many automotive applications are designed to comply with unsuppressed load dump transients specified by ISO16750-2 Pulse 5A.
LM74502, LM74502H can be configured as input surge stopper to provide overvoltage along with input reverse supply protection and protect the downstream loads in case of unsuppressed load dump event.